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US 7,073,632 B2Granted
Safety system for restraining movement of elevator car when car doors are open
AssigneeInvento AG
InventorMatthew Martin
Life of this patent
Estimating the term…
Abstract
A safety system for an elevator car which will prevent movement of the elevator car should the car drift beyond a predetermined distance from the hoistway sill with the car door in an open position.
Claims13
A safety system for selectively restraining movement of an elevator car when stopped at a floor in an elevator hoistway comprising:
- an elevator car including door means for providing access to an interior of said car;
- a safety for selectively restraining movement of said car;
- a rope connected to said safety;
- a stop secured to said rope;
- a spring means disposed about said rope for acting against said stop;
- a latch normally maintaining said spring means under compression;
- and
- a latch actuating means mounted on said car for actuating said latch to release said spring means and urge said rope in a direction to actuate said safety and restrain movement of said car.
5 more elements
A safety system for selectively restraining movement of an elevator car when stopped at a floor in an elevator hoistway comprising:
- a safety for selectively restraining movement of the car;
- a rope connected to said safety;
- a stop secured to said rope;
- a spring means disposed about said rope for acting against said stop;
- a latch normally maintaining said spring means under compression and spaced from said stop;
- and
- a latch actuating means mounted on the car for actuating said latch to release said spring means and urge said rope in a direction to actuate said safety and restrain movement of the car in the hoistway.
4 more elements
Dependencies are inferred from the claim text.